| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase of a coupling loss between strands despite connection between the strands over the full length of a conductor to reduce resistance between the strands such that commutation of transport current can be easily executed. SOLUTION: In this superconductor (Rutherford cable) 1, twist pitches of strands 2U, 2D and a cable pitch of the superconductor 1 are set such that a cutoff electromotive force VC between the strands 2U, 2D at X0 (=0) on the x-axis, i.e., a cutoff electromotive force VC of a pair of the strands 2U, 2D at the center in section, coincides with an in-strand cutoff electromotive force VS, while almost all pairs of the strands 2U, 2D are connected in a low resistance part 3a.
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